Is human blood all the same? "Sure," you may say. "It's all red." Well, it's not as simple as you might know. Blood is made up of different pans, such as red blood cells, white blood cells, and platelets (血小板). Two chemical molecules (分子) on the red blood cells make people's blood different. Scientists mark one molecule "A" and the other molecule "B".

    According to which and how many molecules are on the red blood cell, scientists divide blood into four types: A, B, AB and O. Your blood type will stay the same through your whole life. Scientists have been wondering if there are some links between people's blood type and their personalities (个性), but they don't know for sure. Some say that people with the same blood type may have things in common.

    What's your blood type? Does your friend have the same blood type as you? Read the following.

    People with type A: They look peaceful from the outside. But they ask so much of themselves that they may be very agitated inside. They become happy or sad easily. Sometimes they are shy but always very careful. They can easily win people's trust.

    People with type B: They have strong minds. Once they begin a task and make up their minds to do it, they will not give up easily. They'll try their best to finish it and do it well. They always try to make themselves different from others. They want to do things in their own way.

    People with type AB: Maybe they are the strangest among all blood types. They can be both open and shy, noisy and quiet at the same time! They are responsible and always ready to help others.

    People with type O: They're open and good at making friends. They always begin tasks but don't always finish them in the end. They have lots of new ideas and love to be the centre of attention. They always strongly believe in themselves.

    When you look up into the night sky, you can see the moon. But do you know that you're only seeing one side of the moon? The other side, also known as the far side of the moon, has long been a secret to us. But now, we have a chance to see what's on the far side.

    On January 3rd, China's Chang'e 4 probe(探测器) landed on the far side of the moon. It is the first probe in history to land there.

    Chang'e 4 probe has already done a lot of things on the moon. One of its jobs is to grow plants. Chang'e 4 probe took six living things to the moon. Such as cotton, potatoes and fruit flies(果蝇). The cotton has already started growing. This is the first time humans have grown plants on the moon.

    Chang'e 4 probe also took a lot of pictures of the moon's far side. With these pictures, scientists will learn more about the moon.

    Are you angry by the noise of your alarm clock every morning? Still feel sleepy after getting up? Now, you can say goodbye to that annoying alarm clock, you needn't hear its unpleasant noise every morning.

    The Glow pillow (发光枕)can wake you up with soft LED lights. The lights produce the brightness over 40 minutes just like the sunrise.

The pillow is taking the place of the traditional alarm clock. It was designed (设计)by Eosin McNally and Ian Walton to be against the pressures of a"24 hour "lifestyle.

    The pillow uses a kind of LED material below the surface. It wakes the user up with light. The material can also show the time on the pillow's surface, and it is perfect for those who sleep with their heads completely buried(埋)face down into the pillow. 40 minutes before the pre-set(预设)alarm time, the pillow begins to glow and gently brings the user out of sleep. The natural waking process helps to set "body clock" and makes people build a healthy sleep-and-wake habit slowly.